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National Geographic explores the human body from the inside out as never before with the help of sophisticated camera-work and cutting-edge technology in this fascinating collection of specials.

In four classic programs, National Geographic reveals how our incredible human machine worksfrom the miraculous in-utero development of a fetus to the mechanics of a beating heart, and from the formation of skin to the amazing way our complicated systems work together for sensing, adapting, reproducing, regenerating, and thinking.

Programs include How to Build a Beating Heart, Skin, In the Womb, and Incredible Human Machine.